RHEL 8 : python3.12 (RHSA-2026:77028)

critical Nessus Plugin ID 363764

Synopsis

The remote Red Hat host is missing one or more security updates for python3.12.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:77028 advisory.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

* python: python: Certificate verification bypass via missing server_hostname validation in SSLContext.wrap_bio() (CVE-2026-19553)

* python: Use-after-free of a server-side SSLContext when sni_callback switches contexts (CVE-2026-19445)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL python3.12 package based on the guidance in RHSA-2026:77028.

Plugin Details

Severity: Critical

ID: 363764

File Name: redhat-RHSA-2026-77028.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 10/7/2026

Updated: 10/7/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.67

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-19445

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 7.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:python3.12-debug, p-cpe:/a:redhat:enterprise_linux:python3.12-devel, p-cpe:/a:redhat:enterprise_linux:python3.12-idle, p-cpe:/a:redhat:enterprise_linux:python3.12-libs, p-cpe:/a:redhat:enterprise_linux:python3.12-rpm-macros, p-cpe:/a:redhat:enterprise_linux:python3.12-test, p-cpe:/a:redhat:enterprise_linux:python3.12-tkinter, p-cpe:/a:redhat:enterprise_linux:python3.12

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 10/7/2026

Vulnerability Publication Date: 8/20/2026

Reference Information

CVE: CVE-2026-19445, CVE-2026-19553

CWE: 297, 416

RHSA: 2026:77028

Detections

Analytics